American students work less than East Asian students in high school, but work more in college. We propose an explanation for this puzzle, using a two-stage-signaling model. Signaling can occur over time both in high school and college. We show that main signaling stage may be high school or...

Human capital plays an important role in the theory of economic growth, but it has been difficult to measure this abstract concept. We survey the psychological literature on cross-cultural IQ tests, and conclude that modern intelligence tests are well-suited for measuring an important form of a...

This paper reviews the origins of the 2 per percent rule, arguing that existing evidence for the rule is not as strong as is often supposed and that in any case it can be a misleading guide to the payoff period in policy applications. In the context of a postulated change in the rate of increase...

This paper considers educational investment, wages and hours of market work in an imperfectly competitive labour market with heterogeneous workers and home production. It investigates the degree to which there might be both underemployment in the labour market and underinvestment in education. A...